>chapter 1.1, page 3
Why even ask for distance at such short range with a bolt-action? Most hunters will zero at 300 meters, which would make the POI actually a bit higher than the POA, but by about one inch at most at 150m (with .308, out of a Remington 700). Unless he's looking for a clean lung or heart shot (which I doubt, unless they are planning to eat those goblins), then shooting center-of-mass is the way to go anyway and range is a useless factor to take into account. Also, this is more of a pet-peeve, but people who close one eye when using a scope just bother me. Keeping both eyes open, helps a LOT when tracking a moving target since it's easierer to keep your dominant eye within the scope's eyebox (or, with irons, keeping your eyes correctly focused past the front post).
>chapter 1.2, page 10
That is ONE WONKY ASS-LOOKING SHOTGUN AND SCOPE (trigger guard is just wack)
It looks like this is a the 870 Express version (barrel doesn't look like it (you can see part of the rib, but it just cuts off a few inches forward from the receiver), but the fore-end is definitely from an Express (even though it doesn't bulge out at all to slip over the receiver), and yet it's also very badly drawn/traced at times. Heck, it doesn't even move over an inch from both charging and cocked position (between the two panels on top of the page).
Scope looks like a 6x, which is overkill even with slugs. There's what looks like a throw-lever (hard to see, details are scuffed) which would make this an LPVO scope. Better, but still overkill/ill suited for hunting with a 12ga. A fixed 3x scope is usually as far as (sensible) people push it on hunting forest game with shotguns (more forgiving eye relief, wider eyebox). The only use for higher-power scopes is target acquisition, which IS a bad habit to have anyway but that's one explanation. Most hunters I've had to deal with in the last few years are starting to favor red dots, actually.
>chapter 1.2, page 17
Those rings wouldn't be set high enough to accommodate a scope like this. You can see how much of a raised rail is needed to accommodate that on page 10, which is actually kinda backward. You want your rail to be as low as possible, an use spacers if you want to raise the scope higher. This is the opposite problem to what I've seen in another manga, where the scope is just sitting on top of spacers, on top of a rail that's already too high (putting the scopeline a good five inch above the bore axis).